Noticed a squeak form d left front side while goin over bumps...when I bounce that side of the car I can clearly hear the say same sound..does this meaning a blown left strut?..I'm running tein superstreets....car drives and feels normal expect for the sound...how do u know when coilovers are blown?

I found the issue but I'm looking for the best fix.....after extensive searching I decided to use some wd-40 to see wether the sound was caused by a bushing...after spray individual bushing then goin for a drive the noise went away after I sprayed the strut mount bushing I meaning completely silent...I've always had my reservations about using wd40 on rubber but it was my only option at the time..the bushing seems ok no visible signs of damage...so my new question without changing the bushing what is the next best fix cus I have a feeling the effects of the wd40 might wear out soon